Strongly Correlated Fermi Liquid of ^3He Adsorbed in One Dimensional Meso-Pores

本文从量子简并和一维体系出发，研究了^3He在一维介孔中的吸附态。我们使用FSM-16型和TW 1型作为多孔材料。FSM-16的孔径为18 A直径和5，000至10，000 A长度，TW 1的孔径为20 A直径。当^3He粒子吸附在孔壁上时，沿圆周方向的第一激发能估计大于100 mK。该估计表明，在圆方向上的量子态福尔斯在低于100 mK时落入基态。我们测量了^3He吸附在介孔中的热容。热容量等温线显示在一个原子层附近的覆盖扭结。热容随覆盖度的增加在覆盖度以上大于覆盖度以下。在100 mK以下，覆盖率以下的热容随着温度的降低而增加。然而，在覆盖率之上， 关于我们 随温度降低。结果表明，^3 He吸附原子的第一层是固体，其余的是液体，为了详细研究液体状态，我们测量了吸附在^4 He预涂层介孔上的^3 He的热容，最低可达5 mK。液体层的热容量与低于60 mK的温度成比例。吸附在介孔中的^3He系统被认为是伪一维或理想一维的。在赝一维的情况下，温度依赖性表明费米液体和自旋密度波在低温下的可能性。然而，在我们的温度范围超过5 mK，自旋密度波没有观察到。在理想一维情况下，温度依赖性表明是Tomonaga Luttinger液体，因此^3He在介孔中的吸附态是量子简并态。热容的结果表明，一维系统，虽然我们没有得到直接的证据。少

We have studied the state of ^3He adsorbed in one dimensional mesopores regarding the quantum degeneracy and the one dimensional system. We used FSM-16 type and TW1 type as porous materials. Pore size is 18 A in diameter and 5,000 to 10,000 A in length for FSM-16 and 20 A in diameter for TW1. When ^3He particles are adsorbed on the wall of the pores, the first excited energy in the circular direction is estimated to be larger than 100 mK. This estimation indicates that the quantum state in the circular direction falls in the ground state below 100 mK. Therefore one can expect the one dimensional Fermi liquid.We measured the heat capacity of ^3He adsorbed in the mesopores. The heat capacity isotherm shows a kink at a coverage near one atomic layer. The increase in the heat capacity with coverage is larger above the coverage than that below the coverage. The heat capacity below the coverage increases with decreasing temperature below 100 mK. Above the coverage, however, the heat capacity … More decreases with temperature. The results indicate that the first atomic layer of ^3He adatoms is solid and the rests are liquid.To investigate the liquid state in detail we measured the heat capacity of ^3He adsorbed on ^4He-precoated mesopores down to 5 mK. The heat capacity of the liquid layers is proportional to temperature below 60 mK. The system of ^3He adsorbed in the mesopores is considered to be pseudo or perfect one dimensional. In the case of pseudo one dimension the temperature dependence indicates the Fermi liquid and suggests the possibility of the spin density wave at low temperatures. In our temperature range above 5 mK, however, the spin density wave was not observed. In the case of the perfect one dimension the temperature dependence indicates the Tomonaga Luttinger liquid.In summary the state of ^3He adsorbed in the mesopores is the quantum degeneracy. The results of the heat capacity suggests the one dimensional system, although we did not obtain the evidence directly. Less